Ferro concrete construction



Feb. 16,1932. w. G. GOLDSMITH 1,845,657

' FERRO CONCRETE CONSTRUCTIQN Filed April 9. 1929 a Fig. 1.

B his Attnrney- Patented Feb. 16, 1932 UNITED STATES PATENT OFFICE WILLIAM GEORGE GOLDSMITH, F BANKSTOWN, SYDNEY, NEW SOUTH WALES,

AUSTRALIA FERRO CONCRETE CONSTRUCTION Application filed April 9, 1929, Serial No.

'lhe invention. relates to boxing employed re-concrete construction.

According to my invention the boxing for a beam or the like to be embedded in conp ported from the beam by suspension bolts which because of their peculiar construction are readily removable after the c ucrete has become set.

An extension at right angles from the suspension bolt the end oi? which rests upon the beanu is made tapering to facilitate its uh-a all from the concrete and for the e purpose the upper end of the boltis "edge shaped in section.

A wedge shaped b acket sleeved upon the pension bolt and having a notched end n rich fits upon the flange of the beam maintai the .1 uision bolt in vertical position e the boning and framing are being inped together and serves as a distance L 2 cc between the flange of the beam and the .(illl board of the boxing whereby the thickness of concrete below the beam is determined.

The invention is illustrated in the accon'r panying diawings wherein lg. l. is a side perspective elevation.

Fig. 2, a cross section on A A Fig. l and F 23, a sectional plan on B B Fig. 2.

Similar parts are indicated by the same 'ence numerals throughout the figures. ic s1 pfision bolt 1 has the cylindrical ring extension which is approrimatel' at right angles to the bolt and bears its end upon the flange 3 of the beam.

The suspension bolt passes through a hole in the bottom board at of the concrete mould box, through a cross batten 5 and upon its end has a clamping nut 6.

The upper part of the bolt is wedge shaped in cross section and rounded at the angles as shown in Fig. 3.

An independent wedge shaped spacing bracket 7 sleeved upon the suspension bolt is notched at its outer end 8 to fit upon the flange of the beam.

The hole through the bracket is formed to approximately correspond with the sectional shape of the upper part of the suspension bolt upon which it is sleeved, the hole having a 353,723, and. in Australia June 20, 1928.

flat side 9 which prevents the spacing brackct from turning around on the bolt.

The spacing bracket determines the spaces between the edge of the flange of the beam and the side of the mould box, and also be tween the underside of the beam and the bottom board 4 of the mould box.

The spacing bracket being merely sleeved upon and removable by being slid oil, the suspension bolt may be readily replaced by another similar bracket of different dimensions when it is required to encase vthe beam in concrete of other thickness.

Upon occasions when the spacing bracket is not employed the wedge shape of the bolt in cross section is important to facilitate its withdrawal from the concrete.

I claim 2- 1. F or the purpose indicated in combination a suspension bolt having at its upper end a cylindrical tapering extension and a sided portion below the extension and a spacing bracket having a hole therethrough corresponding to the shape of said sided portion and adapted to be sleeved thereon, as specified.

2. For the purpose indicated a spacing b'acket having a sided hole adapted to fit upon a similarly shaped portion of a suspension bolt and having a notched end adapted to fit upon the flange of a beam, as specified.

In testimony whereof I have signed my name to this specification.

WILLIAM GEORGE GOLDSMITH. 

